Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation and treatment method for low-sulfur manganese cobalt nickel hydroxide

A hydroxide and treatment method technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of product crystallinity decrease, difficult control of crystallization process, improper synthesis conditions, etc., to achieve improved crystallization degree and excellent electrochemical performance Effect

Inactive Publication Date: 2016-02-03
BEIJING EASPRING MATERIAL TECH CO LTD
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared to Ni(OH) 2 , Mn 1-x-y co x Ni y Oh 2 During the preparation process, there are certain differences in the solubility products of the three hydroxides of manganese, cobalt and nickel, and the Mn 2+ and Co 2+ Easily oxidized during synthesis, resulting in Mn 1-x-y co x Ni y Oh 2 The crystallization process is more difficult to control, and improper synthesis conditions will easily lead to a decrease in the crystallinity of the product, accompanied by the formation of α-equal impurity phases, making it more difficult to remove the S impurities in it, and the method for reducing the S content of this material has not been reported.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First prepare a manganese-cobalt-nickel sulfate mixed salt solution with a concentration of 1.0mol / L (molar ratio Mn:Co:Ni=2:2:6), 5mol / L NaOH solution and 5mol / L ammonia solution, and mix the above three The two solutions are passed into the reaction kettle in a parallel flow mode, the temperature of the reaction is controlled to be 55 ° C, the pH value is 12.5, and the N 2Preparation of spherical Mn under protection 0.2 co 0.2 Ni 0.6 (OH) 2 . Then prepare a 1mol / L NaOH solution and heat it to 60°C to rinse the material. The mass ratio of the NaOH solution to the material used is 5:1, and then use pure water at a temperature of 60°C to rinse the material , the mass ratio of pure water to material is 10:1, and the aforementioned NaOH and pure water rinse are repeated 3 times, and the material is dried to obtain Mn after solid-liquid separation. 0.2 co 0.2 Ni 0.6 (OH) 2 . The S content in the final product was tested by inductively coupled plasma emission spectr...

Embodiment 2

[0027] First prepare a manganese-cobalt-nickel sulfate mixed salt solution with a concentration of 3.0mol / L (molar ratio Mn:Co:Ni=1:1:8), 15mol / L NaOH solution and 20mol / L ammonia solution, and mix the above three The two solutions are passed into the reactor in parallel flow mode, the temperature of the reaction is controlled to be 65 ° C, the pH value is 13.0, and the 2 Preparation of spherical Mn under protection 0.1 co 0.1 Ni 0.8 (OH) 2 . Then prepare a 5mol / L KOH solution and heat it to 70°C to soak the material. The mass ratio of the KOH solution to the material used is 10:1, and then use pure water at a temperature of 70°C to soak the material , the mass ratio of pure water to material is 10:1, the aforementioned KOH and pure water immersion are repeated 4 times, and the material is dried to obtain Mn after solid-liquid separation. 0.1 co 0.1 Ni 0.8 (OH) 2 . The S content in the final product was 0.06% by ICP test.

Embodiment 3

[0029] First prepare a manganese cobalt nickel sulfate mixed salt solution with a concentration of 2.0mol / L (molar ratio Mn:Co:Ni=3:2:5), 2mol / L NaOH solution and 2mol / L ammonia solution, and mix the above three The two solutions are passed into the reactor in parallel flow mode, the temperature of the reaction is controlled to be 45°C, the pH value is 12.0, and the 2 Preparation of spherical Mn under protection 0.3 co 0.2 Ni 0.5 (OH) 2 . Then prepare a 2mol / L LiOH solution and heat it to 80°C to rinse the material. The mass ratio of the LiOH solution to the material used is 20:1, and then use pure water at a temperature of 80°C to rinse the material , the mass ratio of pure water to material is 40:1, the aforementioned LiOH and pure water rinse are repeated twice, and the material is dried to obtain Mn after solid-liquid separation. 0.3 co 0.2 Ni 0.5 (OH) 2 . The S content in the final product was 0.08% by ICP test.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation and treatment method for low-sulfur manganese cobalt nickel hydroxide. According to the method, the crystallization degree of a product is increased by controlling parameters including a pH value and the like in a synthetic process, impurities in a crystal structure are reduced, and the effect of reducing the S content of the product is achieved in a mode of combining special alkali liquor elution with water washing. The S content of a prepared material is low and reaches 0.1%, so that a positive electrode material prepared from a precursor has excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials, and in particular relates to a preparation and treatment method of a lithium-ion battery cathode material precursor, that is, low-sulfur manganese-cobalt-nickel hydroxide. Background technique [0002] Lithium-ion batteries have attracted widespread attention due to their high single-cell voltage, high energy density, long cycle life, and no memory effect since they were launched by Sony Corporation of Japan in 1991. They are considered to be one of the batteries with the most potential for development. one. Among the constituent materials of lithium-ion batteries, the positive electrode material occupies an important position, and the quality of the positive electrode material directly determines the performance of the final lithium-ion battery product. Lithium cobaltate (LiCoO 2 ), lithium nickelate (LiNiO 2 ), lithium manganate (LiMn 2 o 4 ), lithium iron pho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/1391H01M4/505H01M4/525
CPCY02E60/10
Inventor 张学全刘亚飞宋顺林
Owner BEIJING EASPRING MATERIAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com